Ghostnote - Add notes to anything.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Context Note - Context Note is a free chrome extension that help you take notes on the web with their context.
Workflowy - A better way to organize your mind.
Page Pad - Page Pad is a productivity tool for creating notes on any particular web page you visit.
Heurio - Do website reviews faster. Heurio eliminates the administration process and lets you focus on creating value in a collaborative and user-friendly way. Perfect for heuristic evaluation, design and development review, bug report, QA testing and more.